I never said, and never meant to imply, that President Bush's support for Israel is a political trick to get Jewish votes. I assume it is sincere and in conformity with his overall policies and beliefs. However, the point remains that if his strong support of Israel does not gain him Jewish votes then future Republican politicians would properly conclude that supporting Israel will not gain them Jewish votes. You are probably correct that evangelical Christians are a stronger force of support for Israel than the largely liberal American Jewish population.
It might not get them votes but it still would get them money!